Dark. Dragon/Xyz/Effect. 1000/0. 4 Level 10 monstersCannot be destroyed by battle. When a monster you control inflicts battle damage to your opponent: You gain Life Points equal to the damage they took. If this card has "Number 92: Heart-eartH Dragon" as an Xyz Material, it gains this effect. Once per turn: You can detach 1 Xyz Material from this card; negate the effects of all face-up cards your opponent currently controls, until the end of this turn. This activation and effect cannot be negated.